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SubjectUSB OOPS 2.6.12
I plugged in a USB 2.0 external hard disk (ION) and the usb controller
apparently could not power the device (wouldn't spin up, the device itself
works on other machines). I unplug the drive and I received an OOPS.

DMESG:
usb 4-5: new high speed USB device using ehci_hcd and address 6
scsi5 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
scsi: Device offlined - not ready after error recovery: host 5 channel 0 id 0 lun 0
usb 4-5: USB disconnect, address 6
usb-storage: device scan complete
Unable to handle kernel NULL pointer dereference at virtual address 00000050
printing eip:
c018cdef
*pde = 00000000
Oops: 0000 [#1]
PREEMPT SMP
Modules linked in: nls_utf8 hfsplus nls_base mga drm nfsd exportfs tun ipv6 nfs lockd sunrpc parport_pc parport 8250_pnp sg sr_mod cdrom snd_ens1370 snd_rawmidi snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_ak4531_codec snd soundcore usb_storage ehci_hcd tsdev ohci_hcd usbhid i2c_piix4 i2c_core uhci_hcd usbcore piix ide_core intel_agp agpgart typhoon crc32 bridge reiserfs dm_mod 8250 serial_core
CPU: 0
EIP: 0060:[<c018cdef>] Not tainted VLI
EFLAGS: 00010282 (2.6.12)
eax: 00000000 ebx: c02c2603 ecx: 0000001f edx: 00000000
esi: cbe1264c edi: c02fe7b0 ebp: c02fe740 esp: de84ade0
ds: 007b es: 007b ss: 0068
Process khubd (pid: 1057, threadinfo=de84a000 task=dfdf4590)
Stack: 00000202 00000202 cbe12400 cbe12654 cbe1264c c02fe7b0 c02fe740 c0206808
00000000 c02c2603 cbe1264c cbe12598 d0b22800 db0f00e0 c0206833 cbe1264c
cbe12400 c02217f8 cbe1264c 00000003 cbe12400 d0b22800 d0b227f8 c02218fb
Call Trace:
[<c0206808>]
[<c0206833>]
[<c02217f8>]
[<c02218fb>]
[<c02207e5>]
[<c0219339>]
[<e0c7aba3>]
[<e0c19136>]
[<c0205208>]
[<c02054bb>]
[<c0204269>]
[<e0c20a50>]
[<e0c1b6e6>]
[<e0c1cb9f>]
[<e0c1bac9>]
[<e0c1ce68>]
[<e0c1cfd5>]
[<c0131520>]
[<c0103272>]
[<c0131520>]
[<e0c1cfa0>]
[<c010148d>]
Code: 5c 24 08 8b 74 24 0c 8b 7c 24 10 83 c4 14 c3 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 57 56 53 83 ec 0c 8b 44 24 20 8b 5c 24 24 <8b> 48 50 8b 50 10 f0 ff 4a 78 0f 88 e3 00 00 00 8b 51 0c 8d 6a

I guess I don't have symbols turned on, so here's the same thing from syslog:
Jul 6 13:47:01 ani kernel: usb 4-5: new high speed USB device using ehci_hcd and address 6
Jul 6 13:47:01 ani kernel: scsi5 : SCSI emulation for USB Mass Storage devices
Jul 6 13:47:01 ani kernel: usb-storage: device found at 6
Jul 6 13:47:01 ani kernel: usb-storage: waiting for device to settle before scanning
Jul 6 13:47:30 ani kernel: scsi: Device offlined - not ready after error recovery: host 5 channel 0 id 0 lun 0
Jul 6 13:47:30 ani kernel: usb 4-5: USB disconnect, address 6
Jul 6 13:47:30 ani kernel: usb-storage: device scan complete
Jul 6 13:47:30 ani kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000050
Jul 6 13:47:30 ani kernel: printing eip:
Jul 6 13:47:30 ani kernel: c018cdef
Jul 6 13:47:30 ani kernel: *pde = 00000000
Jul 6 13:47:30 ani kernel: Oops: 0000 [#1]
Jul 6 13:47:30 ani kernel: PREEMPT SMP
Jul 6 13:47:30 ani kernel: Modules linked in: nls_utf8 hfsplus nls_base mga drm nfsd exportfs tun ipv6 nfs lockd sunrpc parport_pc parport 8250_pnp sg sr_mod cdrom snd_ens1370 snd_rawmidi snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_ak4531_codec snd soundcore usb_storage ehci_hcd tsdev ohci_hcd usbhid i2c_piix4 i2c_core uhci_hcd usbcore piix ide_core intel_agp agpgart typhoon crc32 bridge reiserfs dm_mod 8250 serial_core
Jul 6 13:47:30 ani kernel: CPU: 0
Jul 6 13:47:30 ani kernel: EIP: 0060:[sysfs_hash_and_remove+15/258] Not tainted VLI
Jul 6 13:47:30 ani kernel: EFLAGS: 00010282 (2.6.12)
Jul 6 13:47:30 ani kernel: eax: 00000000 ebx: c02c2603 ecx: 0000001f edx: 00000000
Jul 6 13:47:30 ani kernel: esi: cbe1264c edi: c02fe7b0 ebp: c02fe740 esp: de84ade0
Jul 6 13:47:30 ani kernel: ds: 007b es: 007b ss: 0068
Jul 6 13:47:30 ani kernel: Process khubd (pid: 1057, threadinfo=de84a000 task=dfdf4590)
Jul 6 13:47:30 ani kernel: Stack: 00000202 00000202 cbe12400 cbe12654 cbe1264c c02fe7b0 c02fe740 c0206808
Jul 6 13:47:30 ani kernel: 00000000 c02c2603 cbe1264c cbe12598 d0b22800 db0f00e0 c0206833 cbe1264c
Jul 6 13:47:30 ani kernel: cbe12400 c02217f8 cbe1264c 00000003 cbe12400 d0b22800 d0b227f8 c02218fb
Jul 6 13:47:30 ani kernel: Call Trace:
Jul 6 13:47:30 ani kernel: [class_device_del+184/208]
Jul 6 13:47:30 ani kernel: [class_device_unregister+19/48]
Jul 6 13:47:30 ani kernel: [scsi_remove_device+72/176]
Jul 6 13:47:30 ani kernel: [__scsi_remove_target+155/192]
Jul 6 13:47:30 ani kernel: [scsi_forget_host+69/112]
Jul 6 13:47:30 ani kernel: [scsi_remove_host+25/128]
Jul 6 13:47:30 ani kernel: [pg0+546339747/1070117888]
Jul 6 13:47:30 ani kernel: [pg0+545939766/1070117888]
Jul 6 13:47:30 ani kernel: [device_release_driver+120/128]
Jul 6 13:47:30 ani kernel: [bus_remove_device+123/192]
Jul 6 13:47:30 ani kernel: [device_del+89/160]
Jul 6 13:47:30 ani kernel: [pg0+545970768/1070117888]
Jul 6 13:47:30 ani kernel: [pg0+545949414/1070117888]
Jul 6 13:47:30 ani kernel: [pg0+545954719/1070117888]
Jul 6 13:47:30 ani kernel: [pg0+545950409/1070117888]
Jul 6 13:47:30 ani kernel: [pg0+545955432/1070117888]
Jul 6 13:47:30 ani kernel: [pg0+545955797/1070117888]
Jul 6 13:47:30 ani kernel: [autoremove_wake_function+0/96]
Jul 6 13:47:30 ani kernel: [ret_from_fork+6/20]
Jul 6 13:47:30 ani kernel: [autoremove_wake_function+0/96]
Jul 6 13:47:30 ani kernel: [pg0+545955744/1070117888]
Jul 6 13:47:30 ani kernel: [kernel_thread_helper+5/24]
Jul 6 13:47:30 ani kernel: Code: 5c 24 08 8b 74 24 0c 8b 7c 24 10 83 c4 14 c3 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 57 56 53 83 ec 0c 8b 44 24 20 8b 5c 24 24 <8b> 48 50 8b 50 10 f0 ff 4a 78 0f 88 e3 00 00 00 8b 51 0c 8d 6a

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